I, a scientist with a PhD in Microbiology and Immunology, was a climate change denialist. Wait, let me add, I was an effective climate change denialist: I would throw on a cloak of anecdotal evidence and biased one-sided skepticism and declare myself a skeptic. Good scientists are skeptics, right?I sallied forth and denied every piece of evidence that was presented to me, for a relatively long time. It feels strange when I look back — I inadvertently fell into almost every pitfall of pseudo-science, shutting my eyes and repeating a series of mantras, such as “I don’t believe it!”“Why does it even matter?” and “I don’t care!”. Thankfully, those days are over, but the memories linger. Although the evolution of my thought, from ignorance, to denial, to skepticism and finally to acceptance was a continuum, in retrospect I can distinguish certain phases that are worth listing and discussing. I hope my experience encourages others to loosen up some strongly held beliefs and listen to the din of evidence.. Here are the prominent phases of my climate change denialism:

I created a list of every question and doubt I had about the physics, chemistry, biology, economics, and politics of climate change, and I started reading. I took online courses. I listened to podcasts. Every myth in my head popped and floated away. I learned that cosmic rays cannot account for the current patterns of climate change; that low and middle-income countries and their fragile economies are actually more vulnerable to climate change than high-income countries and should care more about it; that climate change could be accelerating desert formation; and finally that pushing for renewable energies and sustainable development is in harmony with combating climate change. It all made sense without the need for an Evil Monster Corporation hiding a big truth or pushing a secret agenda. I was conspiracy-free!

Here we analyse simultaneous and co-located satellite retrievals from SCIAMACHY (SCanning Imaging Absorption SpectroMeter for Atmospheric CHartographY) of the column-average dry-air mole fraction of CO2 and NO2 for the years 2003–2011 to provide a top-down estimate of trends in emissions and in the ratio between CO2 and NOx emissions. [...] Our findings suggest that the recently installed and renewed technology in East Asia, such as power plants, transportation and so on, is cleaner in terms of NOx emissions than the old infrastructure, and roughly matches relative emission levels in North America and Europe.

In recent years the media, politicians, and activists have popularized the notion that climate change has made disasters worse. But what does the science actually say? Roger Pielke, Jr. takes a close look at the work of the Intergovernmental Panel on Climate Change, the underlying scientific research, and the data to give you the latest science on disasters and climate change. What he finds may surprise you and raise questions about the role of science in political debates.

2. Do not think it worth while to proceed by concealing evidence, for the evidence is sure to come to light.

3. Never try to discourage thinking for you are sure to succeed.

4. When you meet with opposition, even if it should be from your husband or your children, endeavor to overcome it by argument and not by authority, for a victory dependent upon authority is unreal and illusory.

5. Have no respect for the authority of others, for there are always contrary authorities to be found.

6. Do not use power to suppress opinions you think pernicious, for if you do the opinions will suppress you.

7. Do not fear to be eccentric in opinion, for every opinion now accepted was once eccentric.

8. Find more pleasure in intelligent dissent than in passive agreement, for, if you value intelligence as you should, the former implies a deeper agreement than the latter.

9. Be scrupulously truthful, even if the truth is inconvenient, for it is more inconvenient when you try to conceal it.

10. Do not feel envious of the happiness of those who live in a fool’s paradise, for only a fool will think that it is happiness.